Nut-lock.



V O. J. TRESSLER.

NUT LOOK.

N FILED APPLIGA E20, 1918. v 13901765 PatentedMar. 17, 19m

IIIIIIIIIIIII 1 R 1 llmmmmm a! CHARLES J. TRESSLER, OF GLENCOE, PENNSYLVANIA.

NUT-LOCK.

Specification'of Letters Patent.

Application filed June 20, 1913.

Patented ll/llar. ll't, 1914. Serial No. 774,868.

To all whom it may concern Be it known that 1, CHARLES J. TRESSLER, a citizen of, the United States, residing at Glencoe, .in the county of Somerset and State of Pennsylvania, have invented new and useful Improvements in Nut-Locks, of which the following is a specification.

The present invention relates to nut locks and is adapted to provide a simple, cheap, but thoroughly efiective means whereby a nut may be easily and quickly locked and sustained in said locked position upon a bolt.

With the above object in view, and others which will appear as the nature of the invention is more fully understood, the improvement resides in the construction, combination and operative arrangement of parts set forth in the following specification and falling within the scope of the appended claims.

In the drawing: Figure 1 is a plan view of a nut provided with my improvement and showing a bolt engaging the bore thereof and being screwed in a homeward direction, the bolt being shown in section, Fig. 2 is a similar view but illustrating the position of th locking element when an attempt is made at unscrewing the bolt from the nut, Fig. 3 is a plan view of the nut with the locking element removed, Fig. 4: is a perspective view of the locking element, Fig. 5 is a perspective view of the nut, the locking element being removed, Fig. 6 is a perspective view of the locking element looking toward the bottom. wall thereof, Fig. 7 is a sectional view showing the locking cap connected with the nut, and Fig. 8 is a perspective view of the locking cap.

Referring now to the drawing in detail, the numeral 1 designates an ordinary bolt, and 2 an ordinary nut which cooperates with the bolt. The nut has its inner face pro vided with a depression 3 that is arranged adjacent and that communicates with its bore. The depression 8, for the major por tion of its length is arranged concentrically of the bore of the nut, from a to I), and the terminal of the inner wall, at the point 6 provides an abrupt shoulder 4 which is disposed, approximately at a right angle to the longitudinal bore of the nut or the longitudinal plane of the bolt. The inner wall of the depression 3 from the point a to c is curved inwardly to its communication with the bore of the nut, so the said slot has its inner wall of a substantially elliptical formation.

The numeral 6 designates the locking element for the nut. The member 6 has its inner face corresponding to the shape of the rounded inner wall of the depression 3, but the said member 6 is of a lesser length than that of said depression. The rounded looking element is of a thickness corresponding with or slightly less than the depth of the recess 3, and the said member 6 has one of its ends terminating in an abrupt shoulder, as indicated by the numeral 8, while the said member 6 at its end or portion opposite the shoulder 8 is curved inwardly. The inner face is provided with teeth 9, the said teeth projecting just sufliciently within the bore of the nut as to permit of the same contacting with the threads of the bolt, the said contact, however, not exerting a sufficient friction or tension between the teeth 9 and the threads of the bolt to prevent the rotation of the bolt in the direction of the arrow illustrated in Fig. l of the drawing. The frictional engagement is, however, sufficient to draw the element 6 within the depression 3 to cause the rounded or reduced end 7 to be forced tightly between the portion 5 of the depression 3 when the bolt is rotated in the direction illustrated in Fig. 2 of the drawings, and thus a further movement of said bolt will have a tendency to force the member 6 within the bore of the nut and the binding effect between the teeth 9 and the threads of the bolt will effectively prevent the rotation of the nut in the direction of the arrow shown in Fig. 2.

In order to sustain the member 6 within the recess 3, I have provided the inner rounded wall of the said recess between the points a and b with a tongue 10, and the rounded engaging face of the member 6 with a groove 11, which is adapted to coact with the said tongue. As a further means for sustaining the member 6 within the recess 3, I provide the outer face of the nut with a channel or depression A which communicates with the bore of the nut as well as with one of the outer faces or sides of the nut. This channel or depression may if desired, enter the recess 3, and I further provide a cap B having a bolt opening and its outer face formed with an angular enlargement or boss which surrounds the said opening, and the opening may be and preferably is threaded. The cap comprises a flat round disk which is formed of some malleable or bendable material and which is preferably provided with slitted portions, and

the metal between each of the parts of the said slits is of a width equaling or slightlythe same is adapted to be bent to within the said depression to provide bendable locking fingers C.

Having thus described the invention, what I claim is:

1. In a nut lock, the combination with a nut and a bolt therefor said nut having a depression which opens into its bore, the said depression having an inner elliptical wall, one end of which is rounded to its communication with the bore of the nut and its second end terminating in an abrupt shoulder which is arranged atan angle to the bore, a curved locking member of a less length than the recess adapted to be received within the said recess, means arranged upon the curved wall of the depression and engaging in a groove of the locking element for preventing the longitudinal displacement of the locking element from the recess, said locking element havin one of its ends terminating in an abrupt sIioulder which normally contacts with the shoulder provided by the recess, the opposite end of the member being curved and its inner face formed with teeth which are adapted to slightly contact with the threads of the bolt to permit of the bolt being rotated in one direction, and to cause the said bolt to draw the toothed end of the locking element toward the bore of the nut to prevent the rotation of the nut in a second or opposite direction.

2. In a nut look, a nut and a bolt therefor, said nut having an elliptical recess which opens into the bore of the nut, one of the ends of the recess terminating in an abrupt shoulder, the opposite end being curved toward the bore of the nut, the inner rounded wall of the recess being provided with a circumferentially extending tongue, a curved locking element adapted to be received within the recess, said element having a groove adapted to engagewith the tongue of the recess, one of the ends of the locking element terminating in a shoulder, the second end being rounded toward its inner face, the inner face of the locking element adjacent its said curved end being provided with teeth, the said curved end adapted to be arranged within the curved end of the depression which enters the bore of the nut and the teeth of the element adapted to frictionally engage with the threads of the bolt when the nut is arranged upon the bolt. In testimony whereof I afiix my signature in presence of two witnesses.

CHARLES J. TRES'SLER. Witnesses:

'WALTER G. MILLER, JOHN H. MILLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, .D. G. 

